var util = {
    randomInt: function (min, max) {
        var r = Math.random() * (max - min);
        var re = Math.round(r + min);
        re = Math.max(Math.min(re, max), min);
        return re;
    },

    sprintf: function () {
        var i = 0, a, f = arguments[i++], o = [], m, p, c, x, s = '';
        function str_repeat(i, m) {
            for (var o = []; m > 0; o[--m] = i);
            return o.join('');
        }
        while (f) {
            if (m = /^[^\x25]+/.exec(f)) {
                o.push(m[0]);
            }
            else if (m = /^\x25{2}/.exec(f)) {
                o.push('%');
            }
            else if (m = /^\x25(?:(\d+)\$)?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-fosuxX])/.exec(f)) {
                if (((a = arguments[m[1] || i++]) == null) || (a == undefined)) {
                    throw ('Too few arguments.');
                }
                if (/[^s]/.test(m[7]) && (typeof (a) != 'number')) {
                    throw ('Expecting number but found ' + typeof (a));
                }
                switch (m[7]) {
                    case 'b': a = a.toString(2); break;
                    case 'c': a = String.fromCharCode(a); break;
                    case 'd': a = parseInt(a); break;
                    case 'e': a = m[6] ? a.toExponential(m[6]) : a.toExponential(); break;
                    case 'f': a = m[6] ? parseFloat(a).toFixed(m[6]) : parseFloat(a); break;
                    case 'o': a = a.toString(8); break;
                    case 's': a = ((a = String(a)) && m[6] ? a.substring(0, m[6]) : a); break;
                    case 'u': a = Math.abs(a); break;
                    case 'x': a = a.toString(16); break;
                    case 'X': a = a.toString(16).toUpperCase(); break;
                }
                a = (/[def]/.test(m[7]) && m[2] && a >= 0 ? '+' + a : a);
                c = m[3] ? m[3] == '0' ? '0' : m[3].charAt(1) : ' ';
                x = m[5] - String(a).length - s.length;
                p = m[5] ? str_repeat(c, x) : '';
                o.push(s + (m[4] ? a + p : p + a));
            }
            else {
                throw ('Huh ?!');
            }
            f = f.substring(m[0].length);
        }
        return o.join('');
    },

    hexMd5: function (sign) {
        var str = sign + '3c6e0b8a9c15224a8228b9a98ca1531d';
        var md5str = md5.hex(str, str.length);
        return md5str;
    },

    createView: function (view) {
        cc.loader.loadRes(view, (err, prefab) => {
            if (!err) {
                var node = cc.instantiate(prefab);
                cc.director.getScene().getChildByName('Canvas').addChild(node);
                node.setPosition(cc.p(0, 0));
                return node;
            }
        });
    },

    addComponent: function (component, callFun) {
        cc.loader.loadRes(component, (err, prefab) => {
            if (!err) {
                var node = cc.instantiate(prefab);
                node.parent = parentNode;
                node.setPosition(pos);
                if (callFun) {
                    callFun(prefab);
                }
                return node;
            }
        });
    }
};
module.exports = util;